With the launch of iMac Pro, at the end of last year, we were introduced to T2 chip from Apple, which we've talked about a few times. Presented last July, the new MacBooks Pro with Touch Bar They are also equipped with Ma's powerful chip, which is so labor-intensive.
Due to the security features of this component, Apple has detailed in an internal document that T2-equipped Macs must undergo proprietary diagnostic software for certain repairs to be completed, as disclosed by MacRumors. This, of course, impairs unauthorized technical assistance, which does not have access to the software in question.
For MacBook Pro, the diagnostics required after repairing or replacing the display, logic board, Touch ID, and top case (which includes the keyboard, battery, trackpad, and speakers). For iMac Pro, the requirement for “evaluation” applies to the repair of the logic board and flash storage disk.
According to the document, if any of these components are repaired and Apple diagnostic software does not run, the repair process will be incomplete and the system may become “down”. Repair evaluation service for these Macs is limited to Apple Stores and Apple Authorized Service Centers as part of the so-called Apple Service ToolKit.
As we said, this will affect the service performed by independent repair shops that are not Apple certified. In the United States, some of them can even repair and replace certain parts of the iMac Pro and new MacBooks Pro; However, I will not be able to complete the process without the software in question.
Install MacOS Mojave on New MacBooks Pro
Some owners of Touch Bar MacBooks Pro released this year are pointing to some issues when upgrading to macOS Mojave 10.14, released last week.
According to publications on the Apple Support Forum, users are receiving messages such as “An error occurred installing macOS” and references to BridgeOS (modified operating system used by the T2 chip, which runs on the Touch Bar).
For now, Apple has not commented on the errors and therefore there is still no final solution to the problem. Still, some people were able to upgrade after resetting the System Management Controller (System Management Controller, or SMC) of the Mac, responsible for some basic machine functions.
If you're experiencing similar issues, Apple will teach you how to set SMC on this support page.
Update 10/08/2018 s 08:40
After some testing, the iFixit He found that "independent repair (not performed at Apple Stores or CSAAs) is working well, but is under threat."
In a company blog post they explained that even after replacing the screen and logic board of a new MacBook Pro with Touch Bar, the machine worked properly without running the diagnostic software, since iFixit is not authorized by Apple.
Nevertheless, the company said a possible software upgrade could indicate when a repair is complete or not, rendering the machine inoperable if the diagnosis is not performed. The firm is convinced that this software will track serial numbers and other parts data used in the iMac Pro and the new Touch Bar MacBook Pro so that Apple can verify that the CSAAs are completing the repairs correctly.
Well, the fact that the notorious diagnostic has not yet become mandatory for repairs of T2 chip Macs. Apple did not answer the questions of the MacRumors about when the software starts to be used by Apple Stores or authorized stores. It remains for us to continue following